[PATCH 43/60] drm/omap: Create connector for bridges

[Laurent Pinchart]

Use the drm_bridge_connector helper to create a connector for pipelines
that use drm_bridge. This allows splitting connector operations across
multiple bridges when necessary, instead of having the last bridge in
the chain creating the connector and handling all connector operations
internally.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 drivers/gpu/drm/omapdrm/omap_drv.c | 57 ++++++++++++++++++++++++++----
 1 file changed, 50 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 790a2b5a1591..88f9328eda72 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -21,7 +21,9 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge_connector.h>
 #include <drm/drm_fb_helper.h>
+#include <drm/drm_panel.h>
 #include <drm/drm_probe_helper.h>
 
 #include "omap_dmm_tiler.h"
@@ -296,9 +298,13 @@ static int omap_modeset_init(struct drm_device *dev)
 		if (pipe->output->bridge) {
 			ret = drm_bridge_attach(pipe->encoder,
 						pipe->output->bridge, NULL,
-						true);
-			if (ret < 0)
+						false);
+			if (ret < 0) {
+				dev_err(priv->dev,
+					"unable to attach bridge %pOF\n",
+					pipe->output->bridge->of_node);
 				return ret;
+			}
 		}
 
 		id = omap_display_id(pipe->output);
@@ -334,8 +340,31 @@ static int omap_modeset_init(struct drm_device *dev)
 							      encoder);
 			if (!pipe->connector)
 				return -ENOMEM;
+		} else {
+			struct drm_bridge *bridge = pipe->output->bridge;
 
-			drm_connector_attach_encoder(pipe->connector, encoder);
+			pipe->connector = drm_bridge_connector_init(dev,
+								    bridge);
+			if (IS_ERR(pipe->connector)) {
+				dev_err(priv->dev,
+					"unable to create bridge connector for %pOF\n",
+					bridge->of_node);
+				return PTR_ERR(pipe->connector);
+			}
+		}
+
+		drm_connector_attach_encoder(pipe->connector, encoder);
+
+		/*
+		 * FIXME: drm_panel should not store the drm_connector pointer
+		 * internally but should receive it in its .get_modes()
+		 * operation.
+		 */
+		if (pipe->output->panel) {
+			ret = drm_panel_attach(pipe->output->panel,
+					       pipe->connector);
+			if (ret < 0)
+				return ret;
 		}
 
 		crtc = omap_crtc_init(dev, pipe, priv->planes[i]);
@@ -400,8 +429,15 @@ static void omap_modeset_enable_external_hpd(struct drm_device *ddev)
 	unsigned int i;
 
 	for (i = 0; i < priv->num_pipes; i++) {
-		if (priv->pipes[i].connector)
-			omap_connector_enable_hpd(priv->pipes[i].connector);
+		struct drm_connector *connector = priv->pipes[i].connector;
+
+		if (!connector)
+			continue;
+
+		if (priv->pipes[i].output->next)
+			omap_connector_enable_hpd(connector);
+		else
+			drm_bridge_connector_enable_hpd(connector);
 	}
 }
 
@@ -414,8 +450,15 @@ static void omap_modeset_disable_external_hpd(struct drm_device *ddev)
 	unsigned int i;
 
 	for (i = 0; i < priv->num_pipes; i++) {
-		if (priv->pipes[i].connector)
-			omap_connector_disable_hpd(priv->pipes[i].connector);
+		struct drm_connector *connector = priv->pipes[i].connector;
+
+		if (!connector)
+			continue;
+
+		if (priv->pipes[i].output->next)
+			omap_connector_disable_hpd(connector);
+		else
+			drm_bridge_connector_disable_hpd(connector);
 	}
 }
 
-- 
Regards,

Laurent Pinchart